/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.l2j.gameserver.model.actor.position;

import java.util.logging.Logger;

import net.sf.l2j.Config;
import net.sf.l2j.gameserver.model.IPositionable;
import net.sf.l2j.gameserver.model.L2Character;
import net.sf.l2j.gameserver.model.L2Object;
import net.sf.l2j.gameserver.model.L2World;
import net.sf.l2j.gameserver.model.L2WorldRegion;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.util.Point3D;

public class ObjectPosition implements IPositionable
{
    private static final Logger _log = Logger.getLogger(ObjectPosition.class.getName());
    
    // =========================================================
    // Data Field
    private L2Object _activeObject;
    private int _heading = 0;
    private Point3D _worldPosition;
    private L2WorldRegion _worldRegion; // Object localization : Used for items/chars that are seen in the world
    
    // =========================================================
    // Constructor
    public ObjectPosition(L2Object activeObject)
    {
        _activeObject = activeObject;
        setWorldRegion(L2World.getInstance().getRegion(getWorldPosition()));
    }
    
    // =========================================================
    // Method - Public
    /**
     * Set the x,y,z position of the L2Object and if necessary modify its _worldRegion.<BR>
     * <BR>
     * <B><U> Assert </U> :</B><BR>
     * <BR>
     * <li>_worldRegion != null</li><BR>
     * <BR>
     * <B><U> Example of use </U> :</B><BR>
     * <BR>
     * <li>Update position during and after movement, or after teleport</li><BR>
     * @param x
     * @param y
     * @param z
     */
    @Override
    public final void setXYZ(int x, int y, int z)
    {
        if (Config.ASSERT)
            assert getWorldRegion() != null;
        
        setWorldPosition(x, y, z);
        
        try
        {
            if (L2World.getInstance().getRegion(getWorldPosition()) != getWorldRegion())
                updateWorldRegion();
        }
        catch (Exception e)
        {
            _log.warning("Object Id at bad coords: (x: " + getX() + ", y: " + getY() + ", z: " + getZ() + ").");
            if (getActiveObject() instanceof L2Character)
                getActiveObject().decayMe();
            else if (getActiveObject() instanceof L2PcInstance)
            {
                // ((L2PcInstance)obj).deleteMe();
                ((L2PcInstance) getActiveObject()).teleToLocation(0, 0, 0, false);
                ((L2PcInstance) getActiveObject()).sendMessage("Error with your coords, Please ask a GM for help!");
            }
        }
    }
    
    /**
     * Set the x,y,z position of the L2Object and make it invisible.<BR>
     * <BR>
     * <B><U> Concept</U> :</B><BR>
     * <BR>
     * A L2Object is invisible if <B>_hidden</B>=true or <B>_worldregion</B>==null <BR>
     * <BR>
     * <B><U> Assert </U> :</B><BR>
     * <BR>
     * <li>_worldregion==null <I>(L2Object is invisible)</I></li><BR>
     * <BR>
     * <B><U> Example of use </U> :</B><BR>
     * <BR>
     * <li>Create a Door</li>
     * <li>Restore L2PcInstance</li><BR>
     * @param x
     * @param y
     * @param z
     */
    public final void setXYZInvisible(int x, int y, int z)
    {
        L2WorldRegion reg = getWorldRegion();
        
        if (Config.ASSERT)
            assert reg == null;
        
        if (x > L2World.MAP_MAX_X)
            x = L2World.MAP_MAX_X - 5000;
        if (x < L2World.MAP_MIN_X)
            x = L2World.MAP_MIN_X + 5000;
        if (y > L2World.MAP_MAX_Y)
            y = L2World.MAP_MAX_Y - 5000;
        if (y < L2World.MAP_MIN_Y)
            y = L2World.MAP_MIN_Y + 5000;
        
        setWorldPosition(x, y, z);
        
        if (reg != null)
        {
            reg.removeVisibleObject(getActiveObject());
            setWorldRegion(null);
        }
    }
    
    /**
     * checks if current object changed its region, if so, update references
     */
    public void updateWorldRegion()
    {
        if (!getActiveObject().isVisible())
            return;
        
        L2WorldRegion newRegion = L2World.getInstance().getRegion(getWorldPosition());
        if (newRegion != getWorldRegion())
        {
            getWorldRegion().removeVisibleObject(getActiveObject());
            
            setWorldRegion(newRegion);
            
            // Add the L2Oject spawn to _visibleObjects and if necessary to _allplayers of its L2WorldRegion
            getWorldRegion().addVisibleObject(getActiveObject());
        }
    }
    
    // =========================================================
    // Method - Private
    
    // =========================================================
    // Property - Public
    public final L2Object getActiveObject()
    {
        return _activeObject;
    }
    
    @Override
    public final int getHeading()
    {
        return _heading;
    }
    
    @Override
    public final void setHeading(int value)
    {
        _heading = value;
    }
    
    /**
     * Return the x position of the L2Object.
     * @return
     */
    @Override
    public final int getX()
    {
        return getWorldPosition().getX();
    }
    
    @Override
    public final void setX(int value)
    {
        getWorldPosition().setX(value);
    }
    
    /**
     * Return the y position of the L2Object.
     * @return
     */
    @Override
    public final int getY()
    {
        return getWorldPosition().getY();
    }
    
    @Override
    public final void setY(int value)
    {
        getWorldPosition().setY(value);
    }
    
    /**
     * Return the z position of the L2Object.
     * @return
     */
    @Override
    public final int getZ()
    {
        return getWorldPosition().getZ();
    }
    
    @Override
    public final void setZ(int value)
    {
        getWorldPosition().setZ(value);
    }
    
    public final Point3D getWorldPosition()
    {
        if (_worldPosition == null)
            _worldPosition = new Point3D(0, 0, 0);
        return _worldPosition;
    }
    
    public final void setWorldPosition(int x, int y, int z)
    {
        getWorldPosition().setXYZ(x, y, z);
    }
    
    public final void setWorldPosition(Point3D newPosition)
    {
        setWorldPosition(newPosition.getX(), newPosition.getY(), newPosition.getZ());
    }
    
    public final L2WorldRegion getWorldRegion()
    {
        return _worldRegion;
    }
    
    public final void setWorldRegion(L2WorldRegion value)
    {
        _worldRegion = value;
    }
}